package demo3;

import demo3.student;

class Student {
    private String name;
    private int age;
    public String getName() {
        return name;
    }
    public void setName(String name){
        this.name = name;
    }
    public int getAge(){
        return age;
    }

    public void setAge(int age) {
        if (age <= 0){
            System.out.println("您输入的年龄有误！");
        }else {
            this.age = age;
        }
    }
    public void read(){
        System.out.println("大家好，我是" + name + "，年龄"+age);
    }
}
public class Example04 {
    public static void main(String[] args) {
        student stu = new student();
        stu.setName("张三");
        stu.setAge(-18);
        stu.read();
    }
}

